BB Doradus
BB Doradus or BB Dor is a cataclysmic variable, a pre-nova star, thus a close pair binary star system. It is composed of a red dwarf and a white dwarf. Observations of the white dwarf's faint but certain accretion disk are consistent with it being at ~10° inclination.
Its parallax given by the Gaia space observatory's second data release puts the pair at about 3,000 light years away.